[Hyper-V][Azure]ssh session will timeout for a short while for FreeBSD on Azure

This bug was originally filed in Launchpad as [LP: #1697635](https://bugs.launchpad.net/cloud-init/+bug/1697635)

Launchpad details

affected_projects = []

assignee = None

assignee_name = None

date_closed = None

date_created = 2017-06-13T08:41:02.139608+00:00

date_fix_committed = None

date_fix_released = None

id = 1697635

importance = medium

is_complete = False

lp_url = https://bugs.launchpad.net/cloud-init/+bug/1697635

milestone = None

owner = redriver

owner_name = Hongjiang Zhang

private = False

status = confirmed

submitter = redriver

submitter_name = Hongjiang Zhang

tags = ['freebsd']

duplicates = []

_Launchpad user **Hongjiang Zhang(redriver)** wrote on 2017-06-13T08:41:02.139608+00:00_

If we install cloud-init on a FreeBSD VHD which does not install waagent previously, and upload this VHD to Azure. It works fine for SSH connection. But after a short while (~5 seconds), the SSH session is broken.

The reason is cloud-init does not set "ClientAliveInterval" in /etc/ssh/sshd_config.